US5348477A - High definition television head mounted display unit - Google Patents
High definition television head mounted display unit Download PDFInfo
- Publication number
- US5348477A US5348477A US07/866,420 US86642092A US5348477A US 5348477 A US5348477 A US 5348477A US 86642092 A US86642092 A US 86642092A US 5348477 A US5348477 A US 5348477A
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- US
- United States
- Prior art keywords
- fiber optic
- optic cable
- image
- projection screen
- rear projection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
- G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
- G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
- G09B9/30—Simulation of view from aircraft
- G09B9/307—Simulation of view from aircraft by helmet-mounted projector or display
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0132—Head-up displays characterised by optical features comprising binocular systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0132—Head-up displays characterised by optical features comprising binocular systems
- G02B2027/0136—Head-up displays characterised by optical features comprising binocular systems with a single image source for both eyes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0143—Head-up displays characterised by optical features the two eyes not being equipped with identical nor symmetrical optical devices
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
Definitions
- the invention relates to a head mounted display system for producing a replica of an image for viewing by an observer. More specifically, the invention relates to such a system which uses a projection screen as part of an image transmission arrangement in order to obtain a non-pupil forming display.
- Virtual Reality and Remote Presence are closely related fields in which various devices are used to create an impression in the mind of the subject that he or she is in a different and separate environment from actual reality.
- the term "Virtual Reality” is usually confined to the use of completely artificial environments, usually created by computer graphic systems. Visual simulation devices used for training pilots etc., are an example of "Virtual Reality”.
- the term "Remote Presence” is usually used in situations where an observer controls the position of one or more television cameras placed at some distance from the observer, and views the resulting image in such a way as to obtain the feeling that he or she is situated in the same position occupied by the cameras.
- the present invention is a particularly advantageous type of just such a display.
- Helmet displays using fiber optic cables to carry the image from an off-helmet display device to the helmet are known in the prior art as illustrated in, for example, U.S. Pat. No. 4,348,185, Breglia et al, Sep. 7, 1982, U.S. Pat. No. 4,439,157, Breglia et al, Mar. 27, 1984, U.S. Pat. No. 4,439,755 LaRussa, Mar. 27, 1984 and U.S. Pat. No. 4,743,200, Welch et al, May 10, 1988.
- a visual scene is transmitted by CRT's 37 and 39 through fiber optic cables 51 and 53 respectively.
- the scene is then transmitted through an optic system including lenses 57 and 59 and beam splitter 61, onto a reflective screen 63.
- the scene is then reflected from the screen 63 to the eyes of an observer and the data from two optical paths overlap whereby the scene is seen by the observer to appear at optical infinity.
- an optical path coupler 14 is secured to a helmet 22 of an observer so that its angular orientation is a function of the head movement of the observer.
- a display is provided of meter-type data and/or topographical features in the ordinary line of site of the observer.
- an optical image is fed, via a fiber optic cable, to an eyepiece of an observer.
- the eyepiece is preferably a wide angle eyepiece mounted on the helmet of the observer.
- a replica of the image is produced in the line of site of the observer, the replica appearing to originate at a distance.
- the '755 patent, the '200 patent, and the '185 patent all include within their teachings means for tracking the head movements of the observer, and the '157 patent includes within its teachings means for tracking the eyes of the observer.
- a display system for producing a replica of an image for viewing by an observer comprising:
- eyepiece means disposed in front of the eyes of said observer
- said projection screen means transmitting said image to said eyepiece means
- FIG. 1 is an optical schematic of a display system in accordance with the invention viewed from the side;
- FIG. 2 is a front view of the embodiment illustrated in FIG. 1;
- FIG. 3 illustrates a second embodiment of the invention
- FIG. 4 illustrates a third embodiment of the invention
- FIG. 5 illustrates a typical field of view of a display system in accordance with the invention.
- an image which is generated by an imaging source 1, which can be a television projector, is relayed to the input end of a fiber optic bundle 2 through a relay lens 3.
- the image is then transmitted to an optical assembly consisting of a projection lens 4, a rear projection screen 7 and an eyepiece 8.
- the eyepiece 8 uses a spherical mirror 9 and a flat beam splitter 10. This spherical mirror can be replaced by a spherical beam splitter which allows the observer to see the real world as well as the image on the screen 7. This may be an advantage in those applications where the observer needs to interact with his real environment.
- Other eyepieces well known in the art, can be used.
- the beam splitter 5 deflects part of the output of the projection lens 4 to a mirror 6A which reflects the light beam to rear projection screen 7A which is on top of one part of eyepiece 8 which is in front of eye 13A of the observer.
- the beam splitter 5 transmits the remainder of the light beam to a mirror 6B which in turn reflects it to mirror 6C and then to rear projection screen 7B.
- Rear projection screen 7B is on top of that part of the eyepiece 8 which is in front of the eye 13B of the viewer.
- the image is transmitted by two fiber optic cables as illustrated in FIG. 3.
- beam splitter 5' deflects part of the image to a first fiber optic cable 2A.
- the rest of the image from the beam splitter 5' is transmitted to a second fiber optic cable 2B.
- the output of 2B is optically transmitted to a first projection lens (as projection lens 4 in FIG. 1), and the output of 2A is similarly transmitted to an identical projection lens.
- the output of each projection lens is then transmitted to a rear projection screen as in 7 of FIG. 1, and the output of the two rear projection screens are transmitted to an eyepiece 8.
- the projection lenses, rear projection screens and eyepiece are not illustrated in FIG. 3.
- two image sources 1A and 1B feed respective fiber optic cables 2A and 2B through respective relay lens 3A and 3B.
- the fiber optic cable outputs are transmitted by respective projection lens (not shown) to respective rear projection screens, one for each eye (also not shown) to the eyepiece.
- the replica of the image carried by the fiber optic cable or cables is seen through the eyepiece and appears to originate at a distance. It is also possible for the replica of the image to be combined with the direct view of objects seen through the eyepiece so that the observer is able to see the real world as well as the image on the screens 7. This will be an advantage in applications where the observer needs to interact with his real environment.
- the invention would normally be used with a position sensing means to measure the position and attitude of the observer's head. Such devices are well known in the art and require no further description. This information is used by the device producing the image so that the observer sees an appropriate image wherever he or she looks.
- the device producing the image may be a computer graphics system or any other device capable of storing a representation of the environment which the observer wishes to view.
- a head velocity sensing device may also be used to some advantage in order to reduce the effect of transport delay of the overall system.
- the image source comprises a high definition television (HDTV) projector.
- HDTV high definition television
- Other projection devices with suitable optical characteristics may also be used.
- FIG. 5 A typical field of view seen by the observer is shown in FIG. 5. Normally this field of view would have a uniform resolution and level of detail determined by the characteristics of the HDTV projector or any other device producing the image. In an alternative arrangement, only the central part 11 of the field of view would have a high resolution, and a high level of detail. The surrounding peripheral field 12 would have a lower resolution and level of detail. This arrangement tends to match the performance of the human visual system. The main advantage of this arrangement is to reduce the cost and size of the device producing the image. In the most advantageous embodiment of this arrangement, the central area of high resolution and high detail would be slaved to the eye position of the observer. In this case, the invention would include an eye tracking device. Eye tracking devices are known in the art and require no further description at this time.
- the relay lens 3 includes optical elements to produce the correct mapping function to ensure the image seen by the observer through the eyepiece 8 is essentially free of any geometric distortion. Other techniques well known in the art may also be used.
- an image enhancement technique such as "wave length multiplexing” as described in Fiber Optics Principals in Medicine, W. Siegmund et al, Annuals of the New York Academy of Sciences, Vol. 157, 1969 or “dynamic scanning” as described in Fiber Optics Principals and Applications, N. G. Kapany, 1967, is used to reduce the visibility of the physical structure of the fiber optic bundle 2 and to increase the resolution of the fiber optic bundle 2.
- the use and inclusion of the rear projection screen or screens 7 is a particularly advantageous feature of the invention as the use of such a screen makes the systems non-pupil forming.
- a pupil forming system where the eyepiece views an aerial image. The observer must place his or her eye in the pupil, which is relatively small, in order to see the complete image.
- the position of the eye relative to the eyepiece is not as critical making the device more suitable for general use.
- FIG. 1 shows the physical relationship of the head mounted optical assembly to the observer's head.
- the optical assembly could be fixed to a helmet and worn in a similar manner to the patents previously described or it could be attached to the head in some other manner.
Abstract
Description
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US07/866,420 US5348477A (en) | 1992-04-10 | 1992-04-10 | High definition television head mounted display unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US07/866,420 US5348477A (en) | 1992-04-10 | 1992-04-10 | High definition television head mounted display unit |
Publications (1)
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US5348477A true US5348477A (en) | 1994-09-20 |
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US07/866,420 Expired - Fee Related US5348477A (en) | 1992-04-10 | 1992-04-10 | High definition television head mounted display unit |
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Cited By (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5584696A (en) * | 1994-07-28 | 1996-12-17 | Evans & Sutherland Computer Corp. | Hang gliding simulation system with a stereoscopic display and method of simulating hang gliding |
US5684498A (en) * | 1995-06-26 | 1997-11-04 | Cae Electronics Ltd. | Field sequential color head mounted display with suppressed color break-up |
US5715337A (en) * | 1996-09-19 | 1998-02-03 | The Mirco Optical Corporation | Compact display system |
US5751493A (en) * | 1996-11-15 | 1998-05-12 | Daewoo Electronics Co., Ltd. | Head-mounted display apparatus with a single image display device |
GB2319424A (en) * | 1996-11-15 | 1998-05-20 | Daewoo Electronics Co Ltd | Head-mounted display including single image display device |
US5984477A (en) * | 1998-05-22 | 1999-11-16 | Cae Electronics Ltd. | Helmet mounted display with improved SLM illumination |
US6023372A (en) * | 1997-10-30 | 2000-02-08 | The Microoptical Corporation | Light weight, compact remountable electronic display device for eyeglasses or other head-borne eyewear frames |
US6057966A (en) * | 1997-05-09 | 2000-05-02 | Via, Inc. | Body-carryable display devices and systems using E.G. coherent fiber optic conduit |
EP1012655A1 (en) * | 1996-10-08 | 2000-06-28 | The Microoptical Corporation | Image combining system for eyeglasses and face masks |
US6091546A (en) * | 1997-10-30 | 2000-07-18 | The Microoptical Corporation | Eyeglass interface system |
US6205275B1 (en) | 1998-06-22 | 2001-03-20 | Brian E. Melville | Fiber optic image transfer assembly and method of using |
US6204974B1 (en) | 1996-10-08 | 2001-03-20 | The Microoptical Corporation | Compact image display system for eyeglasses or other head-borne frames |
US6353503B1 (en) | 1999-06-21 | 2002-03-05 | The Micropitical Corporation | Eyeglass display lens system employing off-axis optical design |
US6618099B1 (en) | 1999-06-21 | 2003-09-09 | The Microoptical Corporation | Display device with eyepiece assembly and display on opto-mechanical support |
US6676259B1 (en) | 2002-06-21 | 2004-01-13 | International Business Machines Corporation | Stereographic display device |
US6724354B1 (en) | 1999-06-21 | 2004-04-20 | The Microoptical Corporation | Illumination systems for eyeglass and facemask display systems |
US6847336B1 (en) | 1996-10-02 | 2005-01-25 | Jerome H. Lemelson | Selectively controllable heads-up display system |
WO2006110009A1 (en) * | 2005-04-14 | 2006-10-19 | Deo Com Co., Ltd. | Projection type head mounted display apparatus |
US20060290714A1 (en) * | 2004-07-08 | 2006-12-28 | Microsoft Corporation | Matching digital information flow to a human perception system |
US7158096B1 (en) | 1999-06-21 | 2007-01-02 | The Microoptical Corporation | Compact, head-mountable display device with suspended eyepiece assembly |
WO2007031986A3 (en) * | 2005-09-12 | 2007-05-31 | Elbit Systems Ltd | Near eye display system |
EP1808722A2 (en) * | 1996-10-08 | 2007-07-18 | The Microoptical Corporation | Image Combining System for Eyeglasses and Face Masks |
US7313246B2 (en) | 2001-10-06 | 2007-12-25 | Stryker Corporation | Information system using eyewear for communication |
US20090131591A1 (en) * | 2006-05-16 | 2009-05-21 | Wacker Chemie Ag | Alkoxysilane cross-linked polymers having improved elastic recovery properties |
US7891818B2 (en) | 2006-12-12 | 2011-02-22 | Evans & Sutherland Computer Corporation | System and method for aligning RGB light in a single modulator projector |
US8077378B1 (en) | 2008-11-12 | 2011-12-13 | Evans & Sutherland Computer Corporation | Calibration system and method for light modulation device |
US8358317B2 (en) | 2008-05-23 | 2013-01-22 | Evans & Sutherland Computer Corporation | System and method for displaying a planar image on a curved surface |
US8570656B1 (en) | 2009-04-06 | 2013-10-29 | Paul Weissman | See-through optical system |
US8702248B1 (en) | 2008-06-11 | 2014-04-22 | Evans & Sutherland Computer Corporation | Projection method for reducing interpixel gaps on a viewing surface |
US9265458B2 (en) | 2012-12-04 | 2016-02-23 | Sync-Think, Inc. | Application of smooth pursuit cognitive testing paradigms to clinical drug development |
US9380976B2 (en) | 2013-03-11 | 2016-07-05 | Sync-Think, Inc. | Optical neuroinformatics |
US9641826B1 (en) | 2011-10-06 | 2017-05-02 | Evans & Sutherland Computer Corporation | System and method for displaying distant 3-D stereo on a dome surface |
CN106773058A (en) * | 2017-01-17 | 2017-05-31 | 华为机器有限公司 | The display device of virtual reality |
US9720233B2 (en) | 2014-11-07 | 2017-08-01 | Honeywell International Inc. | Compact proximity display utilizing image transfer |
WO2018029684A1 (en) * | 2016-08-09 | 2018-02-15 | Kashter Yuval | An apparatus for projecting synthetic data onto an image forming device within a housing of an optical instrument |
WO2018052350A1 (en) * | 2016-09-16 | 2018-03-22 | Saab Ab | A head up or head mounted display arrangement and a method for presenting at least one image via at least one surface element |
US9995934B2 (en) | 2013-09-27 | 2018-06-12 | tooz technologies GmbH | Spectacle lens for a display device that can be fitted on the head of a user and generates an image, and display device with such a spectacle lens |
US9995935B2 (en) | 2013-09-27 | 2018-06-12 | tooz technologies GmbH | Spectacle lens for a display device that can be fitted on the head of a user and generates an image, and display device with such a spectacle lens |
US10007119B2 (en) | 2013-09-27 | 2018-06-26 | tooz technologies GmbH | Spectacle lens for a display device that can be fitted on the head of a user and generates an image, and display device with such a spectacle lens |
US10120194B2 (en) | 2016-01-22 | 2018-11-06 | Corning Incorporated | Wide field personal display |
US10481397B2 (en) | 2013-07-26 | 2019-11-19 | tooz technologies GmbH | Spectacle lens and display device with such a spectacle lens |
USD903630S1 (en) * | 2016-02-29 | 2020-12-01 | Sony Corporation | Earphone |
US10976551B2 (en) | 2017-08-30 | 2021-04-13 | Corning Incorporated | Wide field personal display device |
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Cited By (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5908300A (en) * | 1994-07-28 | 1999-06-01 | Evans & Sutherland Computer Corporation | Hang gliding simulation system with a stereoscopic display |
US5584696A (en) * | 1994-07-28 | 1996-12-17 | Evans & Sutherland Computer Corp. | Hang gliding simulation system with a stereoscopic display and method of simulating hang gliding |
US5684498A (en) * | 1995-06-26 | 1997-11-04 | Cae Electronics Ltd. | Field sequential color head mounted display with suppressed color break-up |
US5715337A (en) * | 1996-09-19 | 1998-02-03 | The Mirco Optical Corporation | Compact display system |
US6847336B1 (en) | 1996-10-02 | 2005-01-25 | Jerome H. Lemelson | Selectively controllable heads-up display system |
US20050206583A1 (en) * | 1996-10-02 | 2005-09-22 | Lemelson Jerome H | Selectively controllable heads-up display system |
EP1808722A3 (en) * | 1996-10-08 | 2007-07-25 | The Microoptical Corporation | Image Combining System for Eyeglasses and Face Masks |
EP1808722A2 (en) * | 1996-10-08 | 2007-07-18 | The Microoptical Corporation | Image Combining System for Eyeglasses and Face Masks |
US6204974B1 (en) | 1996-10-08 | 2001-03-20 | The Microoptical Corporation | Compact image display system for eyeglasses or other head-borne frames |
US6384982B1 (en) | 1996-10-08 | 2002-05-07 | The Microoptical Corporation | Compact image display system for eyeglasses or other head-borne frames |
US6356392B1 (en) | 1996-10-08 | 2002-03-12 | The Microoptical Corporation | Compact image display system for eyeglasses or other head-borne frames |
EP1012655A1 (en) * | 1996-10-08 | 2000-06-28 | The Microoptical Corporation | Image combining system for eyeglasses and face masks |
EP1012655A4 (en) * | 1996-10-08 | 2000-12-20 | Microoptical Corp | Image combining system for eyeglasses and face masks |
GB2319424B (en) * | 1996-11-15 | 2001-02-28 | Daewoo Electronics Co Ltd | Head-mounted display apparatus with a single image display device |
GB2319423B (en) * | 1996-11-15 | 2001-02-21 | Daewoo Electronics Co Ltd | Head-mounted display apparatus with a single image display device |
US5808802A (en) * | 1996-11-15 | 1998-09-15 | Daewoo Electronics Co. Ltd. | Head-mounted display apparatus with a single image display device |
GB2319424A (en) * | 1996-11-15 | 1998-05-20 | Daewoo Electronics Co Ltd | Head-mounted display including single image display device |
GB2319423A (en) * | 1996-11-15 | 1998-05-20 | Daewoo Electronics Co Ltd | Head-mounted display including single image display device |
US5751493A (en) * | 1996-11-15 | 1998-05-12 | Daewoo Electronics Co., Ltd. | Head-mounted display apparatus with a single image display device |
US6057966A (en) * | 1997-05-09 | 2000-05-02 | Via, Inc. | Body-carryable display devices and systems using E.G. coherent fiber optic conduit |
US6091546A (en) * | 1997-10-30 | 2000-07-18 | The Microoptical Corporation | Eyeglass interface system |
US6349001B1 (en) | 1997-10-30 | 2002-02-19 | The Microoptical Corporation | Eyeglass interface system |
US6023372A (en) * | 1997-10-30 | 2000-02-08 | The Microoptical Corporation | Light weight, compact remountable electronic display device for eyeglasses or other head-borne eyewear frames |
US5984477A (en) * | 1998-05-22 | 1999-11-16 | Cae Electronics Ltd. | Helmet mounted display with improved SLM illumination |
US6205275B1 (en) | 1998-06-22 | 2001-03-20 | Brian E. Melville | Fiber optic image transfer assembly and method of using |
US7158096B1 (en) | 1999-06-21 | 2007-01-02 | The Microoptical Corporation | Compact, head-mountable display device with suspended eyepiece assembly |
US6618099B1 (en) | 1999-06-21 | 2003-09-09 | The Microoptical Corporation | Display device with eyepiece assembly and display on opto-mechanical support |
US6724354B1 (en) | 1999-06-21 | 2004-04-20 | The Microoptical Corporation | Illumination systems for eyeglass and facemask display systems |
US6353503B1 (en) | 1999-06-21 | 2002-03-05 | The Micropitical Corporation | Eyeglass display lens system employing off-axis optical design |
US7313246B2 (en) | 2001-10-06 | 2007-12-25 | Stryker Corporation | Information system using eyewear for communication |
US6676259B1 (en) | 2002-06-21 | 2004-01-13 | International Business Machines Corporation | Stereographic display device |
US20060290714A1 (en) * | 2004-07-08 | 2006-12-28 | Microsoft Corporation | Matching digital information flow to a human perception system |
US7548239B2 (en) * | 2004-07-08 | 2009-06-16 | Microsoft Corporation | Matching digital information flow to a human perception system |
WO2006110009A1 (en) * | 2005-04-14 | 2006-10-19 | Deo Com Co., Ltd. | Projection type head mounted display apparatus |
WO2007031986A3 (en) * | 2005-09-12 | 2007-05-31 | Elbit Systems Ltd | Near eye display system |
US20090147331A1 (en) * | 2005-09-12 | 2009-06-11 | Elbit Systems Ltd | Near eye display system |
US8079713B2 (en) | 2005-09-12 | 2011-12-20 | Elbit Systems Ltd. | Near eye display system |
US20090131591A1 (en) * | 2006-05-16 | 2009-05-21 | Wacker Chemie Ag | Alkoxysilane cross-linked polymers having improved elastic recovery properties |
US7891818B2 (en) | 2006-12-12 | 2011-02-22 | Evans & Sutherland Computer Corporation | System and method for aligning RGB light in a single modulator projector |
US8358317B2 (en) | 2008-05-23 | 2013-01-22 | Evans & Sutherland Computer Corporation | System and method for displaying a planar image on a curved surface |
US8702248B1 (en) | 2008-06-11 | 2014-04-22 | Evans & Sutherland Computer Corporation | Projection method for reducing interpixel gaps on a viewing surface |
US8077378B1 (en) | 2008-11-12 | 2011-12-13 | Evans & Sutherland Computer Corporation | Calibration system and method for light modulation device |
US8570656B1 (en) | 2009-04-06 | 2013-10-29 | Paul Weissman | See-through optical system |
US10110876B1 (en) | 2011-10-06 | 2018-10-23 | Evans & Sutherland Computer Corporation | System and method for displaying images in 3-D stereo |
US9641826B1 (en) | 2011-10-06 | 2017-05-02 | Evans & Sutherland Computer Corporation | System and method for displaying distant 3-D stereo on a dome surface |
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